FORD 2015 Expedition - Manual (Page 203)

If Your Vehicle Gets Stuck in Mud or Snow
Note: Do not rock the vehicle if the engine is not at normal operating
temperature or damage to the transmission may occur.
Note: Do not rock the vehicle for more than a minute or damage to the
transmission and tires may occur, or the engine may overheat.
If your vehicle gets stuck in mud or snow, it may be rocked out by
shifting between forward and reverse gears, stopping between shifts in a
steady pattern. Press lightly on the accelerator in each gear.
202 Transmission
2015 Expedition (exd)
Owners Guide gf, 1st Printing, July 2014
USA (fus)